Bestseller Hunter's absorbing ninth Bob Lee Swagger novel (after 2013's The Third Bullet) finds Swagger retired and living on a farm in the Pacific Northwest with an emotionally unsatisfied wife and memories of his sniper glory days. Swagger finds renewed purpose in life after Washington Post reporter Kathy Reilly pulls him in on a story that she's writing from Moscow on Ludmilla Petrova, a beautiful and equally decorated sniper who served in the Soviet Army during WWII and mysteriously disappeared from all records seven decades ago. As Reilly and Swagger travel from the Russian capital to the Ukrainian countryside in search of a resolution to Petrova's story, Swagger develops a keen infatuation with the enigmatic and alluring "White Witch," even as his obsession arouses unwanted suspicion from both the German and Russian governments. You don't have to be a fan of military action fiction to enjoy this installment. (May)